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Variability Calculator

To use the Variability Calculators below, please input your plant data (standard deviation) for each of the parameters and click 'Calculate'.

CEMENT

Parameter	Standard Deviation (?)
Blaine (cm²/g)
45 micron residue
SO₃
EqNa₂O
C₃S
C₃A
Free Lime
Loss on Ignition

CLINKER

Parameter	Standard Deviation (?)
EqNa₂O
C₃S
C₃A
Free Lime

KILN FEED

Parameter	Standard Deviation (?)

Silica Modulus
Alumina Modulus
90 micron residue
MgO
EqNa₂O

Understanding your results

The result of the Variability Calculator for each material is a percentage score. A score of 100% would mean that the variability of all parameters is to the target levels expected by CPI to ensure optimum performance. A score of less than 100% indicates that there is a less than optimal variability in one or more of the parameters in the calculation. The score is calculated by comparing the target variability and then weighted dependent upon its overall impact on the process and product.

Results Colour Key

Your overall result/percentage, as well as each individual parameter is colour-coded based on the values you enter:

Green - your process is under control with respect to the CPI variability parameters.

Orange - your process variability is average which may represent an opportunity for improvement.

Red - your process variability is outside the targets set by CPI and improvement in this parameter will result in a productivity improvement.

If you would like to talk to CPI about variability and process improvement services please Contact Us.